Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822634 | Longitudinal magnetic coated recording medium | Jun Takahashi, Shigeru Fukushima, Ken Itoh, Seiya Ogawa | 1989-04-18 |
| 4746569 | Longitudinal magnetic coated recording medium | Jun Takahashi, Shigeru Fukushima, Ken-ichi Itoh, Seiya Ogawa | 1988-05-24 |